(ˈɔːdɪˌfəʊn) na type of hearing aid consisting of a diaphragm that, when placed against the upper teeth, conveys sound vibrations to the inner ear
audiphone
enUK
audiphone
[′ȯd·ə‚fōn] (engineering acoustics) A device that enables persons with certain types of deafness to hear, consisting of a plate or diaphragm that is placed against the teeth and transmits sound vibrations to the inner ear.